--  @testpoint:opengauss关键字precision(非保留)，作为函数名

--关键字不带引号-合理报错
drop function if exists precision;
create function precision(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带双引号-成功
drop function if exists "precision";
create function "precision"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function "precision";
--关键字带单引号-合理报错
drop function if exists 'precision';
create function 'precision'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `precision`;
create function `precision`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/